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2 years ago

PLS HELP WILL MARK YOU BRAINLIEST! NO FAKE ANSWERS

Mathematics

2 answers:

galina1969 [7]2 years ago

8 0

Answer:

A. - 8

Step-by-step explanation:

Given:

O = 5/2 = 2.5
R > Y
RO = 10.5

The coordinate of O is 10.5 units to the left from the point O:

Y = O - RO
Y = 2.5 - 10.5 = - 8

rusak2 [61]2 years ago

7 0

Answer:

D. -19/2

Step-by-step explanation:

Well, we know that R is greater than Y and that at the midpoint, R is 10.5, so Y can't be greater than this (c, 13) and that it isn't the same (b, 10.5). It could either be -8 or -19/2 (which is -9.5). Being that your first coordinate is in fraction form, the second one would also have the be, making the answer D. -19/2

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Write the quadratic equation whose roots are 4 and 5, and whose leading coefficient is 4.

Umnica [9.8K]

Answer:

Answer: 4x² - 9x + 20 

Step-by-step explanation:

• General quadratic equation:

${ \rm{ {x}^{2} - (sum \: of \: roots)x + (product \: of \: roots) }}$

• sum of roots → 4 + 5 = 9

• product of roots → 4 × 5 = 20

• substitute:

${ \boxed{ \rm{4 {x}^{2} - 9x + 20 }}}$

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2 years ago

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strojnjashka [21]

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3 years ago

What is 5 times a number ,r, decreased by seven

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Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

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nasty-shy [4]

Answer:

Step-by-step explanation:

4x9=36

5x9=45

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2 years ago

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The commuting time for a student to travel from home to a college campus is normally distributed with a mean of 30 minutes and a

Rainbow [258]

Answer:

0.1587

Step-by-step explanation:

Let X be the commuting time for the student. We know that $X\sim N(30, (5)^2)$ . Then, the normal probability density function for the random variable X is given by

$f(x) = \frac{1}{\sqrt{2\pi(5)^{2}}}\exp[-\frac{(x-\mu)^{2}}{2(5)^{2}}]$ . We are seeking the probability P(X>35) because the student leaves home at 8:25 A.M., we want to know the probability that the student will arrive at the college campus later than 9 A.M. and between 8:25 A.M. and 9 A.M. there are 35 minutes of difference. So,

$P(X>35) = \int\limits_{35}^{\infty}f(x)dx$ = 0.1587

To find this probability you can use either a table from a book or a programming language. We have used the R statistical programming language an the instruction pnorm(35, mean = 30, sd = 5, lower.tail = F)

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3 years ago